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IX800 Operation & Service Manual
Inlet pressure drops under 7". Valve train
pressure below nominal value. Heater ignites
but shuts off after awhile. Three error flashes
on ignition controller.
Burner cycles on and off frequently.
Low power output. Excessive CO from
exhaust.
Noise and/or vibration in burner blower. Poor
combustion. Burner turns off. One error flash
on ignition controller.
Orange light always off.
Orange light always on.
Heater runs very hot.
Heater does not turn off when thermostat
turned to minimum. Two error flashes on the
ignition controller.
Heater starts normally. Doesn't cycle with long
ducts. Burner turns off and stays off. No error
lights. Green light on. Output limit switchneeds
reseting.
Note: *Consult manufacturer for error codes.
22
Propane tank too small to vaporize
fast enough or tank freezes.
Low inlet pressure.
Ducts too long, too small, or
obstructed.
Changeover valve set to propane
when connected to natural gas.
Damaged or unbalanced burner
blower impeller.
Preheat relay (1) failure.
Orange light burned out.
Preheat relay (1) failure.
Both output limit switch and side
RTD or RTD controller fail to
operate.*
Solenoid valve leaks.
Solenoid valve installed
backwards.
Solenoid valve stuck open.
Side RTD or RTD controller-
related failure.*
3
3
-
-
1
-
-
-
Y
2
2
2
-
P/N
974-4135
Rev: 2.51
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